Knife jointer



Feb; 20, 1945. 3 J. B, SEVEY 2,369,862

KNIFE JOINTER Filed Nov. 12, 1945 5 Sheets-Sheet l INVENTOR. L} JUL/us B. SEVEY F162 BY Feb. 20, 1945 J. B. SE VEY KNIFE JOINTER Filed Nov. 12, 1943 3 Sheets-Sheet 2 WWW INVENTOR. JUL/US 5. SEVEy A Home Feb. 20, 1945. SEVEY I 2,369,862

KNIFE JOINTER Filed NOV. .12, 1945 3 Sheets-Sheet 3 7 INVENTOR. JUL/U6 5. 551/5) A fforne Patented Feb. 20, 1945 E1 PATENT 7 OFFICE KNIFE JOINTERZ Julius B. seveyg 'swink, Colo., assignor to Holly Sugar-Corporation, Colorado Springs, Colo., a

corporation o'fNew York I Application November 12, 1943, Serial No. 510,058

9 Claims. (01. 51--92) "Thisinvention' relates to improvements in knife "jointer 'andhas reference mor 'particularly to a machine designed 'for use in connection with the reconditioning and sharpening of knives that are employed in connection with beet slicingmachines. 1

In-sugar beet factories; the beets, after being carefully cleaned and washed, aredirectedto a slicing machine where. they are. cut into long narrow strips preparatory-to extractin the sugar, in ithe difiusionbatteryv Such slicing machines are provided with a largenumber of transversely fiuted knives that-must be keptpin goodv'order and which are frequently dulled and otherwise damaged by the presence of solid material, such machine.

"Machine foruse in reconditioning and sharpening such slicer knives are referred to as knife '36 small 'rocks'thataccidentally enter theslioing jointers and must be carefully constructed to:

obtain the best operation. l

It'is theobject of this invention to produce a machine of the type referred to, which shall be of a simple and substantial construction and which shall be provided with meansjfor conven-- iently clamping a knife in place therein andfor moving it transversely of a grinding wheel.

It is the further object o fthis invention to produce a machine of the type'desc'ribed in which the knife clamping means comprises two rela tivelymovable clamping jaws, one of which is provided with'a shoulder for positioning the knife in a predetermined relation thereto, and the other of which is provided with means for engaging the 'kniie and urging it against the'shoulder' and simultaneously therewith clamping it in position Another object of this invention is to produce a machine of this type in which the transverse angularity of the cut made by the wheel can be adjusted to obtain the angular-relationship desired. I

A further object ofthe invention is to produce a machine of this .type' in which the blade clamping means can be raised so as to expose the ground edge-for inspectionduring the jointing operation.

A still furtherobject oi the'invention i t o prov duce' a machine in which-the movable parts associated with the knife clamping and guiding means'shall be protected against abrasives sep- 'arated from the grinding wheel to the-end that excessive wear is prevented. a

' Another object of theinvention is to produce j amachine inwhich the knife'clamping and guiding means can be adjusted as a unit towards and Figure 1 shows a front elevation of the ma chine, a portion being broken away -to disclose I the position of the motor;

-Figure2 is a topv pla view of the'machine shown in Figure 1;, v

, Figure 3 is a section ure 1; Figuretl ure 2;

F ure u're2 ;..c Y Figure 6 is a perspective View showing the lower clampingjaw; I

'gure- 7 is a perspective view of; the carriage taken on line 39-3, Figi -a section taken on their-,4, Fig-- 5.15 a seats takencon line: 5-5, g-

I plate mm, A I

-.Figure 8 is a view showing a slight modification. In the'drawings reference numeral ll] desigates a supporting-surface,--such as azfioorron whichthemachinevrests. The machine consists of a frame or a cabinet-like structure which has been'shown in a more or less diagrammatic manner and which has a back ll, sides 12 and doors l3, which-are connected by means of hinges I with the door framejld. The 'top' of'thecabinet or frame is formed by a plate l6; The'several partsof the cabinet orframe are' connected by angle irons -11; or by other suitablemeans;

Since; the invention does not relate to the support or cabinet, the latter has been shown and describedin a more or less diagrammatic manner. Supported on the top plate lBis a carriage adjusting plate H which is adjustably connected with'platelli by means of four bolts Hi; which pass through elongated openings l9 in plate l1. Bolts l8 arekept from turning by means of a rod 20rthat projects through holesin the heads of .the-bolts as shown-moreparticularly in Figure 4.

Secured to, the top plate 16' are two spaced-bear- .ings 2| in which a shaft 22 is mounted for .rotation. 1 The construction of bearings 2| has notbeenshown because they are of a standard con 'struction' and form no part'of this invention, ex-

cept as they constitute an elementof the combination. Shaft 22 is rotatable in the'bearings; but

held against longitudinal movement therein .by clamping plate or lower jaw which has been desthe particular construction of the ball bearings ignated by reference numeral 55. The jaw 55 is employed. Secured to the outer end of shaft 22, provided with four-threaded openings 56 for the is a. small rotatable brush 23, and secured to the reception of bolts 51 that extend through the other end is a grinding wheel 24. Plate 16 is elongated openings 58 in carriage plate 44. It provided with an opening 25, through which the will thus be seen that the lower clampin J lower portion of the grinding wheel extends. Pocan be moved longitudinally With respect to the sition wbelow' the' grinding wheel'is an inclined carriage plate: and this:..-moyement.is effected and plat zfii'rthafilform t tt pt channel x.controlledubymeans'cfi a::.screw 591. that cooperthrough which the material remove fr m heel ates with thenut 49. Plate 55 iS provided at its and the knives that are being har d, an It outer end with a downwardly extending portion pass to the outside of the cabinet. A 1110110112! 60 t t s a open 6| throug Which a D is supported on a plate 28 on en of hi h- *tionbf bolt 59 passes. This bolt is provided with pivoted at 29 to an angle;iimmbracketflggand v...ancollanflionlits.outer end with adjustable lockthe other end of which is .connectedrby: acslink 1-1 nutstBiaM-Alhandle 64 serves as a means for ro- 3! to a nut 32 that is rotatably connected with tatingirthis sc ewi r he p rpo f m v n plate a screw 33. This screw is held-against.longitw 55 with respect to the carriage Plate The dinal adjustment by means or collar 34 and moves a bf this-adjusting means i clearly apperin bearings in plates 35 that, in turn, are-secured ent'ifmm Figure The lower clamping jaw 55 t t cabinet by means of angle iron brackets is provided at its inner end with a depressed area motor Support Fthat terminates :in 1 a :rtransv'ersely zrexten'ding ing plate can" be"tilted,thereby adjusting thfdis- "se es asua positioning '.means tance-between thecenter'offthe motorshaftand 5 thefsficeliklfifetss- 'L'TheYjaWfl 55531150 the centerof shajffi zz-fofth purpusek m adjust vided' withiaidepression561: inz'whi'clr. ahelical ingthe tension'bfjithe belt? "31. ""'In-"theidrawing positionedelse/Provided with beIt SThas beenf'shown'as'aflat belt" for conventhreaded opening 69 for the recepttonlnfithe I i-ence."in'*fillustratin ;"in:theractuali.construction "threaded llowerfl 9 offgthejrclampmgflfscrewf however; a: niulti=V' type belt drive is employed. he upperziplate.bf'ijaw 55t:.isi:furtherxprovided "rhemotoriis 'connected with. a 'source'bf electric f mi depress area which energy and" controlled"bythe"usiial means-whichflo" erencelwill"heremaifiiwbeimafdeniupper knife have notbeen illustrated because they. are ".of..con i mfe m p t D .ventionaliconstmction u mbtor rotates. in a 'videdzwith' afitubu-larthuh'ila throughrwhichzthe counterclockwlsedirettionwhen""viewed asidn l Screw q iiipmmvfigpre 4 it Eigure 3 and. this imparts to, the 'griiiding'wheel i' "h me Pemngimhub-llsdarger 247' a; rotation-'inthe same direction", wherebythe m m 50f thewlampmgy sclfewi Surface in Contact with thekrfif tame. shamend t-tthatthis'clampmg platermay:moveilongitud nally downwafmy w th respect to the lower aw for a purposawhich J Secured to. the upper surface of.. the carriage W'Wnhhemmaitemappgar' "Al'nutfl"ifcooperates adjusting. S itwo-bearings. thafiihave cwlth .the;npper threadedrendibi :screwr'fl 0..to. move beendesignated by referencenumerals 38. "-These nr'tpwa'rds mielwev-clampmgiaw The are ipogitiondumraxial .afignmentupper knife clamping jawzort-platel2d$f provided to the carriageplate .by'means of tap screwgman rioniits'rlower surfaces wltlnzatdownward-ly extendshift m .m; bearings 3a .ingzpm r1 5f-whileythe'.lowen-end .-eXt6ndS.11ntO the and is movable-in the. direction off"its-'axes;and g f f fl'jiandisemes fulcrmnabout t *--Wh1ch: this 1 awzroriknife-iolampingfplatelzturns.

as is provided in its outer surface witha' tnrea'd- The helical Swing tends-m sepameitheplates .dmpemng; .flnimwhich-thdnner end. pipe and when theenut: M is rotated-Linea directionto dz-is threaded. *"Caps l3" close the'"outer-ends of moyetltiupwfa'rdly'tomscrew upper jaw or .flpipesjqz x.qgherpurposeW)fqtlha,tubular extension I i'knife..clampingrplatewill'i,also.'-.-mo eeupwardly. comprisingupivp "his :=--The inner end-.OftpIate-JZ 1s zpro vided with. two si-ve Materiaharicffrom'tlust' and dirtthat is 'indwnwardly extendmgewnicaliP1118" lethal; wari'ab-lyfound:around thistype machine. In'the 'gage"the*rpperrsmahed"he 66: during form illustratdlthe carriage--plate 11- is: secured the clampmgfandholghng' operation ht lor j bf eAttention -lSfPI10W..-d1166t6d; to. :the fact: that the :bolts l5. i'rhispiate-is 'provided at its outer erid 9 theihub "h mclinedwith wait. aenotch' mom-which hole ll-extends am Dmhwwemng and this inwafdmim thetmannerfshmwnwm; pigurei inclined .surfaceehasebeen design-atedbyrefertersec'ting h hble lls-is aniwopening 'fl-dn which "encfirnumeml 7 wedgashaped Washer 78 .whEnutM sis.msitiondzasdshownGin; Figure .po sitionednbetweerr thelnut-Jdhandltheinclined cafriagelpmt tare. twd bearingstm, surface 11,; and thereforetwhenever thelnut-M is (SOs-which:haveopenings fon the'-reception-2bi -the moved downwardly as to clamp the knife tmnmons; that pmjectezfmm zthebendssvbf-ithe .theiorce. exerted-w ll be iresolvedzinto'two com- .eccenfiflc adjustingwbafi fzvBeajringsgsu are ponents,-.one.of which..extendadownwardly. and astfmdicatcpbywferenceznumeralwalimfigure the othenof wlnchcxtends rearWardlm-and tends 3.1. an'dware: providd with screws fl' lcy means bf 5" Viewed whi'ch': the' trtrunhions fl may 'rbeclarnped and as Figure This last force mve$"the-kmfe m m mtatmn {The inner;efid bf a riag .against. theashouldere 65 "L andz.-servesi-. to position plate restsxoiiitheruppera sui-faceofithe eccenit in apredetermmewmannel" Withoutany- -trics i53a'g-anda-itzsis emdehtzithattby 'turnl y ithe- 'eco t-on tl'ie; :part of' the OP is --centric-fa;bohi; :the axi agt m 3 thefjca g "mufeature of the construction .isiof considerable .im- 'iria efiplatetimntzbee. adjusted:il8ItiCally With -!!B- *vportaneeein mifeiaiointer ot this :type because 'SDECtliOZL'thE to completes l6. .tnu'ringaithiszcadit is necessary t hevc ttin edgewof he knife iustnrcnt;r;plater fl lcwwillmatura-lly mtateesiigntly shall always been aipred terminedmngmar relathe axism shaftetzm. zsnppnntedz'omplate --tilorr to;.the:back:ithereofeso aszto be: surecthat it 144. andrmoviahlerlnng'itndinally therecnsisacknife 'T5sr-willriunctionprbperlyiwhienipositionedsimthe slic- Y I With-the axis of shaft-4D 1 on theshaft and l 2,369,862 J ingimachin'e. At this point attention is directd;

to' thefact that the shoulder'fidfmust be parallel v omn 'otherw'ords, parallel with the dir'ec 'o'n in which the carriage moves during the grindingoperation;

In the drawingshth' axis or shaf has' fl shown parallelwith the axis of shaft'22. {This I a is always aidesirablearrangement, but not essential to proper o'peration,"as the "machine will function properly "even if these" two shafts; are not. parallel. In thesam'e manner itis not 'ab solutely essential that the' axis of the'eccentric 62 shall be parallel withthe'axisof shaft 40, but

it is 'desirable and when an eccentricadjusting element like that shown is" used" absolute accu' racy requires that this element shall be parallel with" shaft '40 'Thej ecce'ntric means "for adjusting; the distance of-the carriage plate-from the top of plate l1can',;of course; be replaced by ,any'suitable mechanical equivalent thereof and the eccentric a'sfshowri is merely representative of means for this purpose. g

' I'n the construction illustrated shait '42 moves longitudinally inbearings "38 but attention is called to the fact that this shaft' may bestationary with-respect to the bearing" and the car r'iage' slidabl-e' on th'efshafto In j this case the car allel with the axis bf the shaft, means for mo'vinglthe clamp-' ing m'ans'tbwards and avvay 'iiromthe axis of the shaft, means for supporting the clamping means, said means comprising a bar positioned between the shaft and the grinding'wheel underneath; the" corresponding end of the clamping means; the upper'surface of the bar being parthe -axis of the shaft, means for adjusting the'loai verticallysaid bar being stationary relative to the base, the clamping means bein movable relative-to the :bar in the direction of its lengthjand means for turning "the grinding Wheel so that thej surface l facing the I supporting bar 2. A slicing knifefjcinter comprising abase, a

grinding iwheel mounted thereon for rotation about'an'- -axis, a'shaft secured to th' e'base and spaced from" the Wheel axis, means carried by the shaft'ior clamping and holding a slicing knife blade; said means being movable "in 'the direc-' I tion 'of'the'axis of the-shaft and mounted for r'iage'-'plate 44 is/provided 'on' its under} suriace witha bearing 19"as s"h0vvn in Figure 8.

'Since grinding machines ofthis kind liberate a lot of abrading'dust and steel particles, it is necessary that shaft 40 be protected and for this purpose fiexible'sleeves Bll'arepr'ovided'which extend from" the bearings 38 to apart-of the shaft adjacent the carriage plate. When a construction like that indicated in Figure 8 is used, these sleeves extend from'the bearing 19 'to points a'd- .iacen't bearings 38,;thefunction in both instances limited} rotary movement about the shaft axis,

saidz' clamping 'meansj comprising two elatively 1 in vaPIe jaVvS, and- Ifleans for movingthem' towards-each other into blade clamping position,

means for mo'vingthe jaws toward and away from the axis of the shaft; means for supporting the'jclampin'g'means comprisin'g'a bar positioned between the-shaft and the grinding Wheel underneath the corresponding end of the clampi'ng mea'nsfs'aid bar being mounted for rotation,

the oiuter surfalc'e' of the'bar having longitudinal elements spaced different distances from its axis w ofrotatiom'me'ans for clamping the bar in robeing to prevent 'abradant-dust from collecting ment of the carriage';- w w -During the jointing knife being ground and "with' this construction the carriage can be tiltedin acounterclockw'ise a direction when viewed as; inFigure 4, bringing the knife into the [dotted lineposition shown;

Y Wfhen difi'erent' "sized'wheelsa re applied to the shaft Z2; the carriage assembly can be ad- .iusted as a unit by shifting the plate 117 with respect to the th it; The ordinary adjustmentof the knife during the grinding 'operation is eiiected" by'jrotating e andl 4' an the. i e'wi th ih i i connected. In the actual construction, the grinding wheel is provided with a cover like that-indicated by broken lines in Figure 3 anddesignated by reference numeralBl. I a With the constructionillustrated, the carriage is moved manually for thepurpo'seof moving the knife across the grindingwheel; Suitable; stops like those designated 'byreference numeral 82 in Figure 2 may be provided; if desired.

, 'Havin described the invention-what is-claimed.

interfering with'the free mojvetatably' adjusted position, and m'eansiorr'otat ing the grinding wheel in such ardirection that the surface facing the -clamping device moves downwardl I 3; A sl cing knife jointereomprising a base, a

srindin'g -wheel mounted' thereon for rotation about an axis, a shaft secured to the'base', spaced from th'e'wheel axis'and'substantially'parallel therewith, means carried by the shaft for clamp top plate l't and then clamping e two plates in adjusted position by'the bolts iii) movablein the direction-of the axisofthe shaft and mounted for limited rotarymovement about mg and'helding a slicing knife blade, said means being movable in thedirection of the axis of the shaft and. mounted. for limited rotary movement aboutthe-shaft axis, said clampingmeans comprising two; relatively'movable jaws and means for moving them-towards each other into'blade 'clamping position,means for moving the jaws towardsand' away from 'th'eaxis of the shaft, means for supporting; the clamping means; comprisin'g a :bar positioned between "the shaft and the grinding Wheel unde'rneath'the corresponding 'e-n'cl of fltheclampin means, said'bar being substantially-"parallel with the shaft, means for adjusting the uppervsurfaceof thebar in a verticaldire'ction and'lfo'r clamping it invertically adjusted po'sitiongand means 'for rotating the grinding, wheel in such a'direction that'the surface. facing the"-'c1ampin'g device moves downwardly. I I l 4. A slicingknif'e -jointer comprising a base, a grindin-gfwheel" mounted thereon for rotation about an axisfa shaft 'secured'to the base'and spaced from "the wheel' axis, means carried by the shaft'for clampingand holding a slicing knife blade, said means being movable in the direction of the axis of the shaft and mounted-for limited rotary movement about the shaft'axis, said clampin'g means comprising two relatively movable iaws and means" for moving them towards each other into blade clamping position, means for moving the jaws towards' and away fromth'e axis V at u. shaft and; the emitting when underneath the corresponding end-1 oi the clampinc means, said bar being, mounted for rotation, the: outer surtace oi the bar being, eccentric with respect to its axis of rotation, means for clamping the bar. in rotate abiy adjusted position, and means for rotating the grinding wheel in such a direction that the. surface the device moves downw.ard-ly..

St A. slicing knite jointer comprising, a. base, a. grinding wheel mounted thereon for, rotation about. an axis, a shaft secured to the base, spaced from the wheel axis and substantially parallel therewith, means carriedby theshaft for holding and clamping a slicing knife blade, said. means being movable in the direction. of the axis. of the shaft and. mounted for, limited rotary movement about the shaft axis, said. clamping means comprising two relatively movabl'ejaws, means for moving the jaws towards. each other into blade clamping position and for simultaneously moving; the jaws relative to each other. in a longitudinal direction, means for moving the jaws towards and away from the axis of the. shaft, means for. supporting the clamping means comprising a bait positioned between thetshaft and the grinding, wheel underneath the corresponding end, of the spaced from the grinding wheel axis and sub-- stantially parallel therewith, a support; bar positioned; between the shaft and the grinding, wheel, the. upper surface/t the bar being positioned in. a horizontal plane parailelwith a horizontal plane. containing: the axis of the.- shaft, a, knife: clamping device comprising a jaw plate. having one end secured to the shaft, and the.- other end, resting on. the; bar, a, second jaw member positioned above the first andsupported thereby, means for urging the, jaws towards each other comprising; a. screw, aiulcrum pin positioned, between the screw and the end of the lower, jaw: adjacent the: shaft, means. for urging the. jaws apart comprising; a compression; spring positioned between the jaws on the opporsiil'le side of;, the screw from the fulcrum, the: lower jaw having; a transverse shoulder tanning; a positioning stop. for a slicer knife, the

upper jaw having spaced downwardly extendingclamping means, said bar being mounted, for rota- I tion,,.the outer surface, at the bar having longituclinal elements spaced different distances from its axis: or rotation, means for clamping the bar in rotatably adjusted position and means, for rotating the grinding wheel; in such a direction that the surface facing the clamping. device. moves downwardly.

6. A slicing knife jointer comprisingv a base, a grinding wheel mounted thereon for rotation about an axis, two spaced bearings supported by the base, a shaitmounted. in the bearings for movement in the direction. of its axis and for rotary movement about-its axis, the shaft being spaced from the grinding: wheel axis and substantially parallel therewith, a support bar positioned between the shaft andthe rinding wheel, the. upper surface of the bar being, positioned. in a horizontal plane parallel. with a horizontal plane containing the axis of the shaft, a knife clampin device comprising a, jaw plate having one end movablyconnected with the shaft and the. other end resting on the bar, a second: jaw member positioned. above the first and supported thereby, means for urging the. jaws towards.- each other comprising a screw, a fulcrum. pin positioned between the screw and the end. of the lower jaw adjacent the shatt, mean-s .ior urging the. jaws apart comprising a compression spring posi tioned between the jaws on the; opposite side of the screw from the. fulcrum, the lower jaw having a transverse shoulder formi g. a positioning stop 01 a slicer knife, the upper jawhaving spaced downwardly extending pins for engaging the upper surface of: the: knife, the: hole in the upper jaw through which the screw passes. being larger than. the screw to permit the: jaw to slide, and means responsive to the clamping; pressure exerted by the screw forexerting av force. tending to move the upper jaw in a direction to force the knife against the shoulder.

'7. A slicing knife jointer comprising a base, a wheei mounted thereon for rotation about an axis, two: spaced bearings supported by the base, a shaft. mounted in the bearings for movement in the direction of. its axis; and for rotary movement about its axis. the. shaft being pins for engaging, the upper surface of the knife, the hole in the upper jaw through which the screw passes being larger than the screw to perthe jaw to slide and means responsive to the clamping; pressure exerted by the screw for exerting, a force tending to; move the upper jawin a direction to. force the knife against theshoulder, said named means. comprising a screw encirclinghub attached to the. upper surface of the upper jaw, the. upper end of. said hub being forwardly and downwardly inclined, and a wedge washer resting on. the huhwith its inclined surface in. operative engagement with the upper surface. of. the hubwhereby the. force exerted by the. screw will be separated. into two components one of which urges the upper jaw rearwardly.

8. A slicer knife clamping and guiding assembly for use with a slicer knife jointer, comprising a plate, two axially spaced bearings secured to the upper surface thereof, a shaft having its ends positioned in the bearings, a support bar carried by the plate spaced from the shaft, a lower jaw plate: having one end movably secured to the shaft and the other end resting on the support bar, the jaw plate being movable, along the axis of th shaft and. angularly about the shaft axis, means. for moving the jaw platetransversely of the shaft, an upperjaw plate. supported on the under one, means comprising a bolt for producing a force urging the jaw plates together, a. fulcrum pin secured to one: plate and engaging the other, the pin being positioned adjacent the shaft, means comprising a compression spring positioned between thev jaw plates, on the opposite side of the boltv from the fulcrum, the lower jaw having its. upper surface provided with a transverse shoulder for positionirg a slicer knife, the upper jaw plate. having downwardly projecting spaced pins for engaging the slicer knife, and means responsive to the clamping force exerted by the screw for producing a force tending to urge the upper jaw plate towards the shaft for moving the knife against the positioning shoulder.

9. A slicer knife clamping and guiding assem- July for use with a. slicer knife jointer, comprising a plate, two axially spaced bearings secured to the upper surface thereof, a shaft having its ends positioned in the bearings, a support bar carried by the plate and spaced from the 'shaft; means for adjusting the distance from the surface of the plate to the upper surface of the support bar, a lower jaw plate. having one: end secured to the shaft, and its other end resting on the support bar,,means for moving said jaw plate in a direction. transversely of the shaft, the jaw plate. beingalso movable in the direction of the axis of the means comprising a spring positioned between the plates for urging them apart, the clamping surface of one of the plates having a transversely extending knife positioning shoulder, and means comprising the clamping screw for producing a a force urging the other plate in a direction facing the shoulder to position the knife thereagains JULIUS B. SEYVEY. 

